Oil filter



Feb. 22, 1955 R. H. BROWN 2,702,636

OIL FILTER Filed July 14, 1950 United States Patent OIL FILTER Robert H.Brown, Pulaski, Tenn.

Application July 14, 1950, Serial No. 173,843

1 Claim. (Cl. 210-112) This invention relates to an oil filter and hasrelation more particularly to a device of this kind for use inconnection with crank case oil or the like circulating under pressure.

In filters now generally in use there is employed a removable top capand frequently leakage occurs at the cap which materially interefereswith the desired functioning of the motor. It is an object of theinvention to avoid this disadvantage.

A still further object of the invention is to provide an oil filterwherein the body is provided therearound with a trough to receive oilthat leaks out when the cap of the body for any reason is not fullyeffective in closing the body tight with means for returning the oilreceived in the trough to the crank case.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved oilfilters whereby certain advantages are attained, as will be hereinaftermore fully set forth.

In order that my invention may be better understood, I will now proceedto describe the same with reference to the accompanying drawings,wherein:

Figure l is a sectional view taken radially through a filter constructedin accordance with an embodiment of the invention, associated partsbeing in elevation, and

Figure 2 is a sectional view taken substantially on the line 22, lookingin the direction of the arrows.

As disclosed in the accompanying drawings, B denotes the body of thefilter open at the top and having its lower or bottom portionintersected by a perforated plate 1 rigid with the side wall 2 of thebody B. The filter element or cartridge F is placed within the body Btliirougih the open top of the body and rests upon the p ate Incommunication with the interior of the body B below the plate is areturn line 3 which returns the oil to the crank case (not shown) orotherwise as may be desired. This line 3 has communication within thebody B through the axial center or lower point of the permanent bottomwall 4 of the body B.

The open top of the body B is closed in a conventional manner by a cap Cheld in place by the bolt 5 inserted from above through the axial centerof the cap C and therealong into the central portion of the plate 1. Thefilter element or cartridge F is provided axially therethrough with abore 7 for the passage of the bolt 5. Interposed between the marginalportion of the applied cap C and the adjacent end of the wall 2 is aconventional gasket 8.

In practice it often occurs that in replacing the cap C after changingthe filter element or cartridge it failed to properly lighten the bolt 6thus allowing leakage of oil. There is also a possibility of oil leakageon account of a 2,702,636 Patented Feb. 22, 1955 defective gasket 8 orby vibration resulting in the cap C becoming loosened.

To collect or recover the oil leakage the upper portion of the body Bhas formed therewith a surrounding gutter 9 wh ch retains the oilleaking out at the top of the body. Leading from a low point of thegutter 9 is a pipe line 10 to return the collected or reclaimed oil tothe crank case.

Delivering within the body B through the side wall 2 and at a pointclosely adjacent to but below the gutter 9 is a line 11. The oil underpressure enters the body B through the line 11 and normally returns tothe crank case through the line 3. As before explained, leakage at thetop or open end of the body B is collected or reclaimed in the gutter 9and returned through the line 10 to the crank case.

In order to prevent foreign matter being received in the gutter 9 aconcave-convex lid 12 and a gasket 8' is provided. The marginal portionof the lid 12 carries a continuous depending flange 14 which, togetherwith the gasket 8, rests upon the upper edge of the outer wall of thegutter 9 and is held in place by the spring clips 15 pivotally engaged,as at 16, with the outer wall of the gutter 9 and which engage over themarginal portion of the lid 12.

From the foregoing description it is thought to be obvious that an oilfilter constructed in accordance with my invention is particularly welladapted for use by reason of the convenience and facility with which itmay be assembled and operated.

I claim:

In an oil filter, a cylindrical body having an open top and aconcave-convex bottom wall, a second bottom wall horizontally disposedat the lower end of the side wall of the body and having a plurality ofperforations, a filter cartridge within the body and seated upon saidsecond bottom wall, the convex side of said bottom wall being downwardlydirected, said body having an oil inlet opening through its side walland an oil outlet leading outwardly through the first bottom wall at itscenter, an outwardly and upwardly inclined wall integral with andencircling the upper end of the side wall of said body and forming agutter therewith for the collection of oil overflow from the open end ofthe body, a gasket seated on the edge of the side wall of said body, aconcaveconvex cap seated on said gasket, a bolt passing downwardlythrough the centers of the cap and said cartridge and having its lowerend screw threaded into said second bottom wall, a second gasket seatedon the rim of said inclined wall, a concavo-convex lid supported on saidsecond gasket, ears projecting radially outward from said inclined wall,spring elements of hook form pivotedly mounted on said ears to engagewith the edge of said lid for securing the lid in place, and a drainoutlet leading through said inclined wall adjacent the bottom of thegutter.

References Cited in the file of this patent UNITED STATES PATENTS543,389 Loew July 23, 1895 1,616,577 Janette Feb. 8, 1927 1,647,799Hammer Nov. 1, 1927 2,072,393 Briggs Mar. 2, 1937 2,183,877 Wilkinson etal Dec. 19, 1939 2,529,167 Lewis et a1. Nov. 7, 1950 2,578,020 SandbergDec. 11, 1951

